Mission: Rebuild a BA-48 battery with off the shelf (OTS) batteries using 9 volt and 1-1/2 volt D cell batteries. Well don't be surprised what did you think I was gonna use? 3 volt lithium batteries?
BACKGROUND INTEL: The BA-48 is becoming very scarce and even if it can be found it is often in a very "weak" condition. By rebuilding the battery with OTS battery holders you can replenish this battery any time you want to.
|WARNING: I have had several reports of Energizer
and other brand batteries overheating when used in
parallel. Please make sure that the batteries that you use are fresh,
same date code etc. I suggest testing them for equal voltages under load
before using them in the battery pack. I would not mix different brands
of cells. Some of the overheat reports resulted when the Energizer C cells
was used. During periods when your BA-48 is not being used
I would remove the cells that are in parallel.
Please read Energizer's Product Safety sheet at: http://data.energizer.com/PDFs/carbonzinc_psds.pdf
The BA-48 battery was a fairly robust unit and supplied a B+ voltage and a filament voltage. Lots of folks asked me at the MRCA 2003 meet at Gilbert about my battery powering the GRC-109 which was set up in "Zorro's Houch" (See note below)
NOTE: The term "Zorro's Houch" was originated by N3FRQ. If you do not know what a "houch" is then ask me next year at the MRCA meet and I will be glad to explain it to you. A link to the MRCA is at the bottom of this page.
|Start off the project by carefully opening the top, cut the top of the battery on three sides so that one long side of the original box acts as a hinge. Then pull the old A and B packs out of the container. Don't tear up the container. Take the A and B packs to your nearest battery dealer for proper disposal after all we don't want to contaminate the garbage dump.|
|Click here if you would like to see more photos of the interior of the BA-48|
|I reinforced the original cardboard outer sides of the BA-48 cardboard package with light plywood stock using the cardboard removed from the interior of the battery as a pattern.|
The ends were also reinforced.
|After reinforcing all four walls I put three D cells in the bottom to check for clearance and then fabricated a second cover to go over the D cell package . . . the second floor is supported by the steps shown.|
An article on "Saving Old Military Batteries by LTC William Howard
is posted on the Army Radio Sales site.
If you are looking for BA-48 batteries, Fair Radio still has BA-48's
for sale in a "weak" condition. Click on the link and then do
a "search" for the BA-48. (include the dash)